Expect the hiring process to be negative; Even though Fannie Mae has had quite a ride over the past 5 years, HR hasn't gotten the memo. It will take a tremendously long time to set up the interviews. You can only trust in what you discuss directly with the hiring manager. When 12 weeks had gone by since they originally contacted me and only one round of interviews had taken place, I let them know that I had an offer from another company and needed to know what their timeline was for the next round. HR immediately fired off a communication to me saying they thanked me for my interest - essentially ending the process. It felt like a "I broke up with you first" type of approach. Very strange. The director/hiring manager for this position had recruited me directly along with another member of the team. The hiring manager was not informed by HR that I had contacted regarding timeline. They were surprised when I followed up with them directly.
Difficult for most people to wait 3-4 months to go through a hiring process - all while being told the employer is in a "tremendous hurry" to get the project started. Not sure why it is this way, but do not take this personally if you are experiencing it.